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LED bulbs glow when off -- no neutral wire
When you use a dimmer, there are 3 things you want to be able to do:
1. Turn the light on to full.
2. Dim the light to your desired level.
3. Turn the light off.
Unfortunately, the latter is not possible with all LED light bulbs with this switch.
Here is my understanding why:
The dimmer switch is a "smart switch". It requires a small amount of electricity even when the lights are off. Part of it is for allowing the small LEDs in the switch to glow, part of it is for allowing the electronics in the switch to work.
The manufacturer decided not to require a neutral wire (white wire). The switch leeches power from the connected light bulbs. When the light is on, this is no problem and not noticeable. When the switch is off, it still runs a small amount of current through the bulbs. Based on the large number of positive reviews, it seems that the current is low enough and most LED bulbs do not glow. Mine do though. And if I keep the switch "off" long enough, they start to flicker.
If you want a smart switch, I recommend a dimmer switch with a neutral wire where "off" means "off", i.e. no current goes through the bulbs.
(To be fair, if your house wiring does not have a neutral wire, then this dimmer switch is a reasonably option as long as you can find LED bulbs that do not glow / flicker.)
Let me propose a theory:
The more efficient and the more sophisticated LED bulbs get, the more likely it is that the leeching current of this switch will make LED bulbs glow and flicker when the switch is turned off. Therefore, I fear that more and more people will have this issue in the future.
Reason for my 1-star rating:
It defeats the purpose of a switch if you cannot turn the lights off completely.
The attached picture shows the LED glow with the switch off.
January 2016 · Tools and Home Improvement · verified purchase